The following is our major:PLC system: Allen Bradley ,ABB,GE FANUC,SchneiderDCS system: ABB,Siemens MOORE,Foxboro,Westinghouse,YOKOGAWAESD system: Triconex ,HIMA , Bently Nevada ,ICSExcitation cards : ABB,GE MarkeIf you find the same parts from any other suppliers cheaper than us , we will try to match that the same price,or provide you with a further discount.